#pragma once
#include "BieuThuc.h"
class BieuThucTong : public BieuThuc
{
public:
	BieuThuc BT1;
	BieuThuc BT2;
	bool Dau; // 1: dau cong, 0: dau tru
	BieuThucTong();
	BieuThucTong(BieuThuc BTa,BieuThuc BTb);
	BieuThuc TinhDaoHam();
	double TinhGiaTri();
};

